<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title>颜色</title>
		<style>
			.seasons{
				width: 20em;
				height: 20em;
				font-size: 20px;
				display: grid;
				grid-template-columns: repeat(2, 1fr);
				grid-gap: 0.2em;
			}
			.seasons div{
				border-radius: 0.1em solid gray;
				text-align: center;
				line-height: 6em;
				font-size: 1.5em;
				color: black;
			}
			.seasons div:nth-child(3){
				order: 4;
			}
			.seasons div:nth-child(1){
				background-color: springgreen;
				border-radius: 100% 0 0 0;
			}
			.seasons div:nth-child(2){
				background-color: #ff4500;
				border-radius: 0 100% 0 0;
			}
			.seasons div:nth-child(3){
				background-color: rgb(255, 215, 0);
				border-radius: 0 0 100% 0;
			}
			.seasons div:nth-child(4){
				background-color: hsl(195, 100%,50%);
				border-radius: 0 0 0 100%;
			}
		</style>
	</head>
	<body>
		<figure class="seasons">
			<div class="spring">spring</div>
			<div class="summer">summer</div>
			<div class="fall">fall</div>
			<div class="winter">winter</div>
		</figure>
	</body>
</html>
